1/* $OpenBSD: tcb.h,v 1.2 2011/11/08 15:39:50 kettenis Exp $ */ 2 3/* 4 * Copyright (c) 2011 Philip Guenther <guenther@openbsd.org> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19#ifndef _MACHINE_TCB_H_ 20#define _MACHINE_TCB_H_ 21 22#ifdef _KERNEL 23 24#define TCB_GET(p) \ 25 ((void *)(p)->p_md.md_regs->tf_cr27) 26#define TCB_SET(p, addr) \ 27 ((p)->p_md.md_regs->tf_cr27 = (unsigned)(addr)) 28 29#else /* _KERNEL */ 30 31/* ELF TLS ABI calls for small TCB, with static TLS data after it */ 32#define TLS_VARIANT 1 33 34/* Get a pointer to the TCB itself */ 35static inline void * 36__hppa_get_tcb(void) 37{ 38 void *val; 39 __asm__ ("mfctl %%cr27, %0" : "=r" (val)); 40 return val; 41} 42#define TCB_GET() __hppa_get_tcb() 43 44#endif /* _KERNEL */ 45 46#endif /* _MACHINE_TCB_H_ */ 47